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From: <nwe...@ce...> - 2003-02-25 18:22:14
|
hello, I'm trying to use the non-liear multivariable optimization
functions, but they doesn't work for more than 2 variables!...
octave2.1:5> bfgs('sincn', [0.1 0.1]')
ans =
3.1773
3.1773
octave2.1:6> bfgs('sincn', [0.1 0.1 0.1]')
error: invalid vector index = 3
error: evaluating assignment expression near line 58, column 14
error: evaluating for command near line 56, column 5
error: evaluating if command near line 55, column 3
error: called from `bs_gradient' in file
`/usr/share/octave/2.1.35/site/m/octave-forge/optim/bs_gradient.m'
error: called from `bfgs' in file
`/usr/share/octave/2.1.35/site/m/octave-forge/optim/bfgs.m'
what am I doing wrong?!?! :/
++Nicolau;
--
Nicolau Werneck <nwe...@ce...> E073 FADE 7B75 5482 5631
http://cefala.org/~nwerneck D3C4 6E9A 8EFC 0351 C15D
"Experience is not what happens to a man; it is what a man does with what happens to him."
-- Aldous Huxley
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|
From: Etienne G. <et...@is...> - 2003-02-25 20:35:19
|
Hi,
what is 'sincn'?
Etienne
On Tue, Feb 25, 2003 at 03:21:04PM -0300, nwe...@ce... wrote:
# hello, I'm trying to use the non-liear multivariable optimization
# functions, but they doesn't work for more than 2 variables!...
#
# octave2.1:5> bfgs('sincn', [0.1 0.1]')
# ans =
#
# 3.1773
# 3.1773
#
# octave2.1:6> bfgs('sincn', [0.1 0.1 0.1]')
# error: invalid vector index = 3
# error: evaluating assignment expression near line 58, column 14
# error: evaluating for command near line 56, column 5
# error: evaluating if command near line 55, column 3
# error: called from `bs_gradient' in file
# `/usr/share/octave/2.1.35/site/m/octave-forge/optim/bs_gradient.m'
# error: called from `bfgs' in file
# `/usr/share/octave/2.1.35/site/m/octave-forge/optim/bfgs.m'
#
#
# what am I doing wrong?!?! :/
#
# ++Nicolau;
#
#
# --
# Nicolau Werneck <nwe...@ce...> E073 FADE 7B75 5482 5631
# http://cefala.org/~nwerneck D3C4 6E9A 8EFC 0351 C15D
# "Experience is not what happens to a man; it is what a man does with what happens to him."
# -- Aldous Huxley
#
#
#
# -------------------------------------------------------
# This sf.net email is sponsored by:ThinkGeek
# Welcome to geek heaven.
# http://thinkgeek.com/sf
# _______________________________________________
# Octave-dev mailing list
# Oct...@li...
# https://lists.sourceforge.net/lists/listinfo/octave-dev
#
#
--
Etienne Grossmann ------ http://www.isr.ist.utl.pt/~etienne
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|
From: <nwe...@ce...> - 2003-02-25 22:11:18
|
it's a function that receives a list and give a real number.
bfgs('prod', [0.1 0.1 0.1]') gives the same error.
On Tue, Feb 25, 2003 at 08:40:46PM +0000, Etienne Grossmann wrote:
>
> Hi,
>
> what is 'sincn'?
>
> Etienne
>
> On Tue, Feb 25, 2003 at 03:21:04PM -0300, nwe...@ce... wrote:
> # hello, I'm trying to use the non-liear multivariable optimization
> # functions, but they doesn't work for more than 2 variables!...
> #
> # octave2.1:5> bfgs('sincn', [0.1 0.1]')
> # ans =
> #
> # 3.1773
> # 3.1773
> #
> # octave2.1:6> bfgs('sincn', [0.1 0.1 0.1]')
> # error: invalid vector index = 3
> # error: evaluating assignment expression near line 58, column 14
> # error: evaluating for command near line 56, column 5
> # error: evaluating if command near line 55, column 3
> # error: called from `bs_gradient' in file
> # `/usr/share/octave/2.1.35/site/m/octave-forge/optim/bs_gradient.m'
> # error: called from `bfgs' in file
> # `/usr/share/octave/2.1.35/site/m/octave-forge/optim/bfgs.m'
> #
> #
> # what am I doing wrong?!?! :/
> #
> # ++Nicolau;
> #
> #
> # --
> # Nicolau Werneck <nwe...@ce...> E073 FADE 7B75 5482 5631
> # http://cefala.org/~nwerneck D3C4 6E9A 8EFC 0351 C15D
> # "Experience is not what happens to a man; it is what a man does with what happens to him."
> # -- Aldous Huxley
> #
> #
> #
> # -------------------------------------------------------
> # This sf.net email is sponsored by:ThinkGeek
> # Welcome to geek heaven.
> # http://thinkgeek.com/sf
> # _______________________________________________
> # Octave-dev mailing list
> # Oct...@li...
> # https://lists.sourceforge.net/lists/listinfo/octave-dev
> #
> #
>
> --
> Etienne Grossmann ------ http://www.isr.ist.utl.pt/~etienne
>
> Return-Path: <oct...@li...>
> Delivered-To: nwe...@ce...
> Received: from pinguim.cpdee.ufmg.br [150.164.32.32]
> by localhost with POP3 (fetchmail-5.9.11)
> for nwerneck@localhost (single-drop); Tue, 25 Feb 2003 18:17:30 -0300 (BRT)
> Received: (qmail 16127 invoked from network); 25 Feb 2003 20:36:44 -0000
> Received: from lists.sourceforge.net (HELO sc8-sf-list2.sourceforge.net) (66.35.250.206)
> by pinguim.cpdee.ufmg.br with SMTP; 25 Feb 2003 20:36:43 -0000
> Received: from sc8-sf-list1-b.sourceforge.net ([10.3.1.13] helo=sc8-sf-list1.sourceforge.net)
> by sc8-sf-list2.sourceforge.net with esmtp (Exim 3.31-VA-mm2 #1 (Debian))
> id 18nloC-00038O-00; Tue, 25 Feb 2003 12:36:12 -0800
> Received: from gtisr.ist.utl.pt ([193.136.138.253] helo=anonimo.isr.ist.utl.pt)
> by sc8-sf-list1.sourceforge.net with esmtp (Exim 3.31-VA-mm2 #1 (Debian))
> id 18nlmg-0005Mz-00
> for <oct...@li...>; Tue, 25 Feb 2003 12:34:39 -0800
> Received: from etienne by anonimo.isr.ist.utl.pt with local (Exim 3.35 #1 (Debian))
> id 18nlsd-0007dS-00; Tue, 25 Feb 2003 20:40:47 +0000
> To: nwe...@ce...
> Cc: oct...@li..., Etienne Grossmann <et...@is...>
> Subject: Re: [OctDev] how to use optimizing functions
> Message-ID: <200...@an...>
> Reply-To: et...@is...
> References: <200...@ce...>
> Mime-Version: 1.0
> Content-Type: text/plain; charset=us-ascii
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> In-Reply-To: <200...@ce...>
> User-Agent: Mutt/1.3.28i
> From: Etienne Grossmann <et...@is...>
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> X-Original-Date: Tue, 25 Feb 2003 20:40:46 +0000
> Date: Tue, 25 Feb 2003 20:40:46 +0000
>
>
> Hi,
>
> what is 'sincn'?
>
> Etienne
>
> On Tue, Feb 25, 2003 at 03:21:04PM -0300, nwe...@ce... wrote:
> # hello, I'm trying to use the non-liear multivariable optimization
> # functions, but they doesn't work for more than 2 variables!...
> #
> # octave2.1:5> bfgs('sincn', [0.1 0.1]')
> # ans =
> #
> # 3.1773
> # 3.1773
> #
> # octave2.1:6> bfgs('sincn', [0.1 0.1 0.1]')
> # error: invalid vector index = 3
> # error: evaluating assignment expression near line 58, column 14
> # error: evaluating for command near line 56, column 5
> # error: evaluating if command near line 55, column 3
> # error: called from `bs_gradient' in file
> # `/usr/share/octave/2.1.35/site/m/octave-forge/optim/bs_gradient.m'
> # error: called from `bfgs' in file
> # `/usr/share/octave/2.1.35/site/m/octave-forge/optim/bfgs.m'
> #
> #
> # what am I doing wrong?!?! :/
> #
> # ++Nicolau;
> #
> #
> # --
> # Nicolau Werneck <nwe...@ce...> E073 FADE 7B75 5482 5631
> # http://cefala.org/~nwerneck D3C4 6E9A 8EFC 0351 C15D
> # "Experience is not what happens to a man; it is what a man does with what happens to him."
> # -- Aldous Huxley
> #
> #
> #
> # -------------------------------------------------------
> # This sf.net email is sponsored by:ThinkGeek
> # Welcome to geek heaven.
> # http://thinkgeek.com/sf
> # _______________________________________________
> # Octave-dev mailing list
> # Oct...@li...
> # https://lists.sourceforge.net/lists/listinfo/octave-dev
> #
> #
>
> --
> Etienne Grossmann ------ http://www.isr.ist.utl.pt/~etienne
>
>
> -------------------------------------------------------
> This sf.net email is sponsored by:ThinkGeek
> Welcome to geek heaven.
> http://thinkgeek.com/sf
> _______________________________________________
> Octave-dev mailing list
> Oct...@li...
> https://lists.sourceforge.net/lists/listinfo/octave-dev
>
--
Nicolau Werneck <nwe...@ce...> E073 FADE 7B75 5482 5631
http://cefala.org/~nwerneck D3C4 6E9A 8EFC 0351 C15D
"The great end of life is not knowledge but action."
-- Thomas Huxley
|
|
From: Etienne G. <et...@is...> - 2003-02-26 08:29:54
|
On Tue, Feb 25, 2003 at 07:10:19PM -0300, nwe...@ce... wrote:
# it's a function that receives a list and give a real number.
^
vector
# bfgs('prod', [0.1 0.1 0.1]') gives the same error.
:-) . You expect a minimum at a finite point?
Cheers,
Etienne
#
# On Tue, Feb 25, 2003 at 08:40:46PM +0000, Etienne Grossmann wrote:
# >
# > Hi,
# >
# > what is 'sincn'?
# >
# > Etienne
# >
# > On Tue, Feb 25, 2003 at 03:21:04PM -0300, nwe...@ce... wrote:
# > # hello, I'm trying to use the non-liear multivariable optimization
# > # functions, but they doesn't work for more than 2 variables!...
# > #
# > # octave2.1:5> bfgs('sincn', [0.1 0.1]')
# > # ans =
# > #
# > # 3.1773
# > # 3.1773
# > #
# > # octave2.1:6> bfgs('sincn', [0.1 0.1 0.1]')
# > # error: invalid vector index = 3
# > # error: evaluating assignment expression near line 58, column 14
# > # error: evaluating for command near line 56, column 5
# > # error: evaluating if command near line 55, column 3
# > # error: called from `bs_gradient' in file
# > # `/usr/share/octave/2.1.35/site/m/octave-forge/optim/bs_gradient.m'
# > # error: called from `bfgs' in file
# > # `/usr/share/octave/2.1.35/site/m/octave-forge/optim/bfgs.m'
# > #
# > #
# > # what am I doing wrong?!?! :/
# > #
# > # ++Nicolau;
# > #
# > #
# > # --
# > # Nicolau Werneck <nwe...@ce...> E073 FADE 7B75 5482 5631
# > # http://cefala.org/~nwerneck D3C4 6E9A 8EFC 0351 C15D
# > # "Experience is not what happens to a man; it is what a man does with what happens to him."
# > # -- Aldous Huxley
# > #
# > #
# > #
# > # -------------------------------------------------------
# > # This sf.net email is sponsored by:ThinkGeek
# > # Welcome to geek heaven.
# > # http://thinkgeek.com/sf
# > # _______________________________________________
# > # Octave-dev mailing list
# > # Oct...@li...
# > # https://lists.sourceforge.net/lists/listinfo/octave-dev
# > #
# > #
# >
# > --
# > Etienne Grossmann ------ http://www.isr.ist.utl.pt/~etienne
# >
# > Return-Path: <oct...@li...>
# > Delivered-To: nwe...@ce...
# > Received: from pinguim.cpdee.ufmg.br [150.164.32.32]
# > by localhost with POP3 (fetchmail-5.9.11)
# > for nwerneck@localhost (single-drop); Tue, 25 Feb 2003 18:17:30 -0300 (BRT)
# > Received: (qmail 16127 invoked from network); 25 Feb 2003 20:36:44 -0000
# > Received: from lists.sourceforge.net (HELO sc8-sf-list2.sourceforge.net) (66.35.250.206)
# > by pinguim.cpdee.ufmg.br with SMTP; 25 Feb 2003 20:36:43 -0000
# > Received: from sc8-sf-list1-b.sourceforge.net ([10.3.1.13] helo=sc8-sf-list1.sourceforge.net)
# > by sc8-sf-list2.sourceforge.net with esmtp (Exim 3.31-VA-mm2 #1 (Debian))
# > id 18nloC-00038O-00; Tue, 25 Feb 2003 12:36:12 -0800
# > Received: from gtisr.ist.utl.pt ([193.136.138.253] helo=anonimo.isr.ist.utl.pt)
# > by sc8-sf-list1.sourceforge.net with esmtp (Exim 3.31-VA-mm2 #1 (Debian))
# > id 18nlmg-0005Mz-00
# > for <oct...@li...>; Tue, 25 Feb 2003 12:34:39 -0800
# > Received: from etienne by anonimo.isr.ist.utl.pt with local (Exim 3.35 #1 (Debian))
# > id 18nlsd-0007dS-00; Tue, 25 Feb 2003 20:40:47 +0000
# > To: nwe...@ce...
# > Cc: oct...@li..., Etienne Grossmann <et...@is...>
# > Subject: Re: [OctDev] how to use optimizing functions
# > Message-ID: <200...@an...>
# > Reply-To: et...@is...
# > References: <200...@ce...>
# > Mime-Version: 1.0
# > Content-Type: text/plain; charset=us-ascii
# > Content-Disposition: inline
# > In-Reply-To: <200...@ce...>
# > User-Agent: Mutt/1.3.28i
# > From: Etienne Grossmann <et...@is...>
# > Sender: oct...@li...
# > Errors-To: oct...@li...
# > X-BeenThere: oct...@li...
# > X-Mailman-Version: 2.0.9-sf.net
# > Precedence: bulk
# > List-Help: <mailto:oct...@li...?subject=help>
# > List-Post: <mailto:oct...@li...>
# > List-Subscribe: <https://lists.sourceforge.net/lists/listinfo/octave-dev>,
# > <mailto:oct...@li...?subject=subscribe>
# > List-Id: Developers of the GNU Octave Repository. <octave-dev.lists.sourceforge.net>
# > List-Unsubscribe: <https://lists.sourceforge.net/lists/listinfo/octave-dev>,
# > <mailto:oct...@li...?subject=unsubscribe>
# > List-Archive: <http://sourceforge.net/mailarchive/forum.php?forum=octave-dev>
# > X-Original-Date: Tue, 25 Feb 2003 20:40:46 +0000
# > Date: Tue, 25 Feb 2003 20:40:46 +0000
# >
# >
# > Hi,
# >
# > what is 'sincn'?
# >
# > Etienne
# >
# > On Tue, Feb 25, 2003 at 03:21:04PM -0300, nwe...@ce... wrote:
# > # hello, I'm trying to use the non-liear multivariable optimization
# > # functions, but they doesn't work for more than 2 variables!...
# > #
# > # octave2.1:5> bfgs('sincn', [0.1 0.1]')
# > # ans =
# > #
# > # 3.1773
# > # 3.1773
# > #
# > # octave2.1:6> bfgs('sincn', [0.1 0.1 0.1]')
# > # error: invalid vector index = 3
# > # error: evaluating assignment expression near line 58, column 14
# > # error: evaluating for command near line 56, column 5
# > # error: evaluating if command near line 55, column 3
# > # error: called from `bs_gradient' in file
# > # `/usr/share/octave/2.1.35/site/m/octave-forge/optim/bs_gradient.m'
# > # error: called from `bfgs' in file
# > # `/usr/share/octave/2.1.35/site/m/octave-forge/optim/bfgs.m'
# > #
# > #
# > # what am I doing wrong?!?! :/
# > #
# > # ++Nicolau;
# > #
# > #
# > # --
# > # Nicolau Werneck <nwe...@ce...> E073 FADE 7B75 5482 5631
# > # http://cefala.org/~nwerneck D3C4 6E9A 8EFC 0351 C15D
# > # "Experience is not what happens to a man; it is what a man does with what happens to him."
# > # -- Aldous Huxley
# > #
# > #
# > #
# > # -------------------------------------------------------
# > # This sf.net email is sponsored by:ThinkGeek
# > # Welcome to geek heaven.
# > # http://thinkgeek.com/sf
# > # _______________________________________________
# > # Octave-dev mailing list
# > # Oct...@li...
# > # https://lists.sourceforge.net/lists/listinfo/octave-dev
# > #
# > #
# >
# > --
# > Etienne Grossmann ------ http://www.isr.ist.utl.pt/~etienne
# >
# >
# > -------------------------------------------------------
# > This sf.net email is sponsored by:ThinkGeek
# > Welcome to geek heaven.
# > http://thinkgeek.com/sf
# > _______________________________________________
# > Octave-dev mailing list
# > Oct...@li...
# > https://lists.sourceforge.net/lists/listinfo/octave-dev
# >
#
# --
# Nicolau Werneck <nwe...@ce...> E073 FADE 7B75 5482 5631
# http://cefala.org/~nwerneck D3C4 6E9A 8EFC 0351 C15D
# "The great end of life is not knowledge but action."
# -- Thomas Huxley
#
#
#
# -------------------------------------------------------
# This sf.net email is sponsored by:ThinkGeek
# Welcome to geek heaven.
# http://thinkgeek.com/sf
# _______________________________________________
# Octave-dev mailing list
# Oct...@li...
# https://lists.sourceforge.net/lists/listinfo/octave-dev
#
#
--
Etienne Grossmann ------ http://www.isr.ist.utl.pt/~etienne
|
|
From: Etienne G. <et...@is...> - 2003-02-26 12:44:15
|
Hello,
use octave 2.1.XX. I am not sure whether bfgs() is meant to work
with octave 2.0.XX.
With 2.1.44, sincn (bfgs('sincn', [0.1 0.1 0.1]')) yields -0.21723,
which seems to be the minimum of 'sincn'. Note that "sincn" has non
isolated minima and that bfgs() looks for a local minimum.
On Wed, Feb 26, 2003 at 08:02:13AM -0300, nwe...@ce... wrote:
# well, sorry, but 'prod' converges with X0 = [0.1 0.1], and I didn't test
# other points...
This is a glitch in the bfgs() algorithm. If started from
any_value*ones(1,N), it will go straight down to something near
zero. Once there, it sees the derivative is zero and calls it a
stop. This has to do with the way line minimization is done. Should
fix.
Hth,
Etienne
# sincn is defined this way:
#
# function r = sincn(X)
# n = norm(X);
# r = sin(n+0.00001)/n;
# return
#
# I can always minimize it to something (local minima) with two points,
# but that weird error occurs with more.
#
# I'm moving to the bleeding-edgre development version since it seems that
# a lot has changed recentely in the optimization functions... but the help
# from bfgs and dfp in this version does say that it works for more variables...
#
#
#
# On Wed, Feb 26, 2003 at 08:35:47AM +0000, Etienne Grossmann wrote:
# > On Tue, Feb 25, 2003 at 07:10:19PM -0300, nwe...@ce... wrote:
# > # it's a function that receives a list and give a real number.
# > ^
# > vector
# >
# > # bfgs('prod', [0.1 0.1 0.1]') gives the same error.
# >
# > :-) . You expect a minimum at a finite point?
# >
# > Cheers,
# >
# > Etienne
# >
# > #
# > # On Tue, Feb 25, 2003 at 08:40:46PM +0000, Etienne Grossmann wrote:
# > # >
# > # > Hi,
# > # >
# > # > what is 'sincn'?
# > # >
# > # > Etienne
# > # >
# > # > On Tue, Feb 25, 2003 at 03:21:04PM -0300, nwe...@ce... wrote:
# > # > # hello, I'm trying to use the non-liear multivariable optimization
# > # > # functions, but they doesn't work for more than 2 variables!...
# > # > #
# > # > # octave2.1:5> bfgs('sincn', [0.1 0.1]')
# > # > # ans =
# > # > #
# > # > # 3.1773
# > # > # 3.1773
# > # > #
# > # > # octave2.1:6> bfgs('sincn', [0.1 0.1 0.1]')
# > # > # error: invalid vector index = 3
# > # > # error: evaluating assignment expression near line 58, column 14
# > # > # error: evaluating for command near line 56, column 5
# > # > # error: evaluating if command near line 55, column 3
# > # > # error: called from `bs_gradient' in file
# > # > # `/usr/share/octave/2.1.35/site/m/octave-forge/optim/bs_gradient.m'
# > # > # error: called from `bfgs' in file
# > # > # `/usr/share/octave/2.1.35/site/m/octave-forge/optim/bfgs.m'
# > # > #
# > # > #
# > # > # what am I doing wrong?!?! :/
# > # > #
# > # > # ++Nicolau;
--
Etienne Grossmann ------ http://www.isr.ist.utl.pt/~etienne
|
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